TY - JOUR AU - N. T. Durdyev AU - M. B. Orazov TI - Completeness of the root functions in some eigenvalue problems for fourth-order equations of mixed type JO - Differencialʹnye uravneniâ PY - 1984 SP - 174 EP - 176 VL - 20 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1984_20_1_a24/ LA - ru ID - DE_1984_20_1_a24 ER -